大量医学研究表明,如果人体缺乏维生素,就容易罹患眼疾,引起视力障碍,甚至失明。维生素A是构成视网膜感光色素的主要成分,与视蛋白结合成为视紫红质,对眼感受光线的刺激和辨别颜色的功能活动关系密切。如果维生素A缺乏,视网膜杆状细胞感光物质合成受影响,对弱光线的敏感性降低, A large number of medical studies have shown that if the body lacks vitamins, it is easy to suffer from eye diseases, causing visual impairment and even blindness. Vitamin A is the main component of retinal pigment, and opsin protein into rhodopsin, the eye feel the light stimulus and distinguish the color of the functional activity is closely related. If vitamin A deficiency, the synthesis of retinal rod-like sensitizers is affected, the sensitivity to weak light is reduced,